11211112001 has 4 divisors (see below), whose sum is σ = 11597702100. Its totient is φ = 10824521904.

The previous prime is 11211111997. The next prime is 11211112057. The reversal of 11211112001 is 10021111211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4379262976 + 6831849025 = 66176^2 + 82655^2 .

It is not a de Polignac number, because 11211112001 - 2² = 11211111997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211112061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193295006 + ... + 193295063.

It is an arithmetic number, because the mean of its divisors is an integer number (2899425525).

Almost surely, 2^11211112001 is an apocalyptic number.

It is an amenable number.

11211112001 is a deficient number, since it is larger than the sum of its proper divisors (386590099).

11211112001 is an equidigital number, since it uses as much as digits as its factorization.

11211112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386590098.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11211112001 its reverse (10021111211), we get a palindrome (21232223212).

The spelling of 11211112001 in words is "eleven billion, two hundred eleven million, one hundred twelve thousand, one".